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3 years ago

Which compound forms a green aqueous solution

Chemistry

1 answer:

Irina18 [472]3 years ago

3 0

NiCl₂ commonly forms a green aqueous solution.

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Match the element with its description. Match Term Definition Lithium A) Highly reactive gas Lead B) Nonreactive gas Fluorine C)

eduard

Lithium - Malleable, soft, and shiny

Lead - Opaque solid with higher density

Fluorine - Highly reactive gas

Krypton - Nonreactive gas

*<em>hope I helped :)</em>*

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3 years ago

Can someone help me with this??

zloy xaker [14]

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The following: Jupiter, Saturn, Uranus, or Neptune.

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any of the planets Jupiter, Saturn, Uranus, and Neptune whose orbits lie beyond the asteroid belt.

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2 years ago

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The first excited electronic energy level of the helium atom is 3.13 x 10-18 J above the ground level. Estimate the temperature

salantis [7]

Answer:

75603.86473 K

Explanation:

Given that:

The 1st excited electronic energy level of He atom = 3.13 × 10⁻¹⁸ J

The objective of this question is to estimate the temperature at which the ratio of the population will be 5.0 between the first excited state to the ground state.

The formula for estimating the ratio of population in 1st excited state to the ground state can be computed as:

$\dfrac{N_2}{N_1} = e ^{^{-\dfrac{(E_2-E_1)}{KT}}} = e ^{^{-\dfrac{(\Delta E)}{KT}}}$

From the above equation:

Δ E = energy difference = 3.13 × 10⁻¹⁸ J

k = Boltzmann constant = 1.38 × 10⁻²³ J/K

$\dfrac{N_2}{N_1} = 0.5$

Thus:

$0.05 =e^{^{ -\dfrac{3.13 \times 10^{-18} \ J}{1.38\times 10^{-23 \ J/K}\times T}}}$

$In (0.05) = { -\dfrac{3.13 \times 10^{-18} \ J}{1.38\times 10^{-23 \ J/K}\times T}}}$

$-3.00 = { -\dfrac{3.13 \times 10^{-18} \ J}{1.38\times 10^{-23 \ J/K}\times T}}}$

$-3.00 = -226811.5942 \times \dfrac{1}{T}$

$T = \dfrac{-226811.5942}{-3.00 }$

T = 75603.86473 K

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3 years ago

. The element with the following

Ksenya-84 [330]

Explanation:

(a) Chlorine the first row Is 1s the second is 2s followed by 2p...etc as Chlorine has 17 electrons

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3 years ago

What is the difference between a theory and a scientific law?

Westkost [7]

Scientific laws and theories have different jobs to do. A scientific law predicts the results of certain initial conditions. ... In contrast, a theory tries to provide the most logical explanation about why things happen as they do.

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3 years ago

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